tomkins



(No Model.) 2 Sheets-Sheet 1.

A. S. TOMKINS, I'. M. COURAGE & F. A. CIRAUKNALL.

GRAIN DRIER. l

No. 308,291. Patented Nov. 18, 1884.

N. PETERS. Pnummnqgnphnr. washingwn. nc.

2 Sheets-Sheet 2.

(No Model.)

A. S. TOMKINS, F. M. COURAGE 8v F. A. GRAGKNALL.

GRAIN DRIER.

VPafnted Nov. 18, 1884.

zuren/Z075:

NiTE STArEs l' ATENT FICE ALFRED SAVILL TOMKINS, FREDERIC M. COURAGE, AND FRANK. A. ORAOKNALL, OF LONDON, ENGLAND.

GRAINDRIER.

SPECIFICATION forming part of Letters Patent No. 308,291, dated November 18, 1884.-.

Application filed May 7, 1884. (No model.) Patented in England February 7,1881, No. 509.

T0 all zwm, t may concern:

Be it known that we, ALFRED SAVILL TOM- KINs, FREDERIC MIOHELL COURAGE, and FRANK. ARTHUR GRAOKNALL, citizens of En gland, all residing at Gl Mark Lane, in the city of London, England, malt factors, have invented an Improvement in Kilns for Drying Malt, Grain, or other Materials, (for which we have obtained a patent in GreatBritain, No. 509, bearing date February 7, 1881,) of which the following is a specification.

Our invention relates to kilns for drying malt, grain, or other material by means of air heated by passage over a large heating'- surface. The kiln is so arranged that theproducts of combustion from the furnace for heating the air are prevented from coming in direct contact with the material to be dried, but are made to pass through numerous flues,so as to give up the greater part of their .heat to the air before escaping to the chimney.

In the accompanying drawings, Figure 1 is a longitudinal section, and Fig. 2 a transverse section, of a kiln constructed according to our invention. Figs. 3, 4, and 5 are sectional plans on the lines X X, Y Y, and Z Z, respectively.

At the bottom of the kiln is placed the furnace A,the products of combustion from which pass along longitudinal iiues B to the said corners of the lower space, where they enterthe short upright fines B, to which the radial ducs C connect, and thence Ythey 'are conducted by four radial dues, O, which are inclined upward and connected to a central smoke-Hue, D. From this flue they are conducted by radial flues E, inclined upward to chimneys F, which are led through the ventilating-cowls M. The furnace A and thelongitudinal ilues B are roofed by double plates G, having between them an air-space. The air for drying the material passes through this air-space between the plates, becoming more and more heated till it reaches acentral opening, H, in the upper plat-e, whence it ascends an air-shaft, K. Around the shaft K are compartments, which may be employed for storing the material that has been dried or is io be dried. Above the air-shaft K are bat'- iie-plates N, which deflect the heated air and distribute it uniformly under the kilnfloor L, l

which is perforated in the usual manner. The air,after passing through the material laid on the perforated floor L, drying it, escapes through the ventilating-cowls M. Airis snpplied to the kiln by air-passages leading under the ash-pit and hot plate G, so that it is partially heated before entering the space between the hot plates. Y

rlhe temperature of the air may be con- 6o trolled by dampers suitably arranged in the flues. y

Having thus described the nature of our invention and the best means we know for carrying the same into practical effect,we claiml. The combination of a furnace and a series of longitudinal fines, B, the uprightflues B', rising from the end fines, the central flue.

D, the radial fines C, connecting said central flue and ilues B', the chimneys F, and radial 7o fines E, connecting them with said central flue, substantially as described.

2. The furnace A and lines B, havingaroofing composed of double plates G, to forni an airspace between them, the upper plate having a central opening, H, formed therein, in combination with an airshaft, K, formed above said central opening, and baffle-plates AN above said shaft, substantially as described. y

The furnace A, and longitudinal dues B', 8o having aroofing composed of double plates O, to form an air-spacey between them, the upper one of said plates having a central opening,

H, formed therein, the air-shaft K above said opening, the perforated door L, and baffleplates Nabove said shaft and below said door, in combination with the iiue D within said shaft, the chimneys F, the radial dues E, connecting flue D with said chimneys, the radial fines connecting the same flue with the end 9o dues, B, and a ventilatingcowl, M, substantially as described.

In testimony whereof we have signed our names to this specification, in the presence of two 'subscribing witnesses, this 16th day of 95 n April, A. D. 1884.

ALFD. SAVILL TOMKINS. F. M. COURAGE. FRANK. A. CRACKNALL. Vitnesses:

VILLIAM CRIGHTON, JNO. I. M. MILLARD. 

